-transparent.png){kind=logo}
The study of the dynamics of non-linear systems allows the evaluation of the correlation dimension which, in turn, provides an estimate of the number of variables needed to model the process. In such a view, the correlation dimension was calculated for the profiles of the EEG slow-wave activity during sleep obtained from 7 young normal controls and in their corresponding artificial stochastic signals. It was possible to evaluate the complexity of all the real profiles which exhibited an average dimension of 3.76 (SD 0.331), but not that of the artificial control ones. This allows us to conclude that sleep regulation might be considered as a deterministic non-linear process and that the already proposed two-process model of sleep regulation needs to include additional variables with non-linear interactions.
R Ferri, and
F Alicata, and
S Del Gracco, and
M Elia, and
S A Musumeci, and
M C Stefanini
November 1999,
Epilepsia,
R Ferri, and
F Alicata, and
S Del Gracco, and
M Elia, and
S A Musumeci, and
M C Stefanini
June 2001,
Physiology & behavior,
R Ferri, and
F Alicata, and
S Del Gracco, and
M Elia, and
S A Musumeci, and
M C Stefanini
December 2005,
Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology,
R Ferri, and
F Alicata, and
S Del Gracco, and
M Elia, and
S A Musumeci, and
M C Stefanini
February 2007,
Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology,
R Ferri, and
F Alicata, and
S Del Gracco, and
M Elia, and
S A Musumeci, and
M C Stefanini
September 1967,
Archives of general psychiatry,
R Ferri, and
F Alicata, and
S Del Gracco, and
M Elia, and
S A Musumeci, and
M C Stefanini
August 1997,
The American journal of physiology,
R Ferri, and
F Alicata, and
S Del Gracco, and
M Elia, and
S A Musumeci, and
M C Stefanini
March 2011,
Cerebral cortex (New York, N.Y. : 1991),
R Ferri, and
F Alicata, and
S Del Gracco, and
M Elia, and
S A Musumeci, and
M C Stefanini
January 1987,
Human neurobiology,
R Ferri, and
F Alicata, and
S Del Gracco, and
M Elia, and
S A Musumeci, and
M C Stefanini
September 2008,
Proceedings of the National Academy of Sciences of the United States of America,
R Ferri, and
F Alicata, and
S Del Gracco, and
M Elia, and
S A Musumeci, and
M C Stefanini
March 1990,
Behavioural brain research,
